Twenty Twenty-Three unexpected PHP debug output

When using the Tools -> Child Theme configurator, on Step 3 I received the following message: The theme “Twenty Twenty-Three” generated unexpected PHP debug output:

Notice: ob_end_flush(): Failed to send buffer of zlib output compression (0) in /…../wp-includes/functions.php on line 5349

I did not continue to Step 4 as I’m not sure if this is an actual problem that needs solving for a child to be successfully created.

I posted into the Theme support thread, as advised by configurator, however, I was advised it is probably an error being thrown by the Child Theme Configurator plugin itself – rather than the theme … https://wordpress.org/support/topic/unexpected-php-debug-output-when-creating-child-theme-for-tt3/?view=all#post-17182696.

Will this error cause child theme errors or can I continue with the configurator wizard regardless of the error?